Kotlin Java Developer

Unikie; Oulu; On-site; EUR 60,000 - 90,000; Full time

Job summary

Unikie in Finland seeks an experienced Kotlin/Java Full Stack Developer to join a long-term customer project. You will build Kotlin/Java backend services, React frontends, and contribute to cloud infrastructure, CI/CD, and software architecture in a cloud-native environment.

You will work across the full stack, collaborate with multi‑vendor teams, apply secure development practices, and work with Kubernetes, AWS, and various databases.

Qualifications

• 5+ years of experience in Full Stack or Backend development.
• Strong hands-on experience with Kotlin, Java, and Spring Boot.
• Experience with React and TypeScript/JavaScript.
• Solid understanding of microservices and API integrations.
• Experience with Kubernetes, cloud platforms (AWS), and CI/CD tools.
• Familiarity with Infrastructure as Code tools such as Terraform, CloudFormation, or Ansible.
• Good knowledge of SQL databases and Redis.
• Experience with secure development practices and testing.
• Experience working in multi-vendor environments.
• Fluent Finnish and English.

Responsibilities

• Develop backend services using Kotlin, Java, and Spring Boot.
• Build and maintain React applications with TypeScript/JavaScript.
• Design and integrate REST and SOAP APIs.
• Develop scalable microservices running on Kubernetes and cloud platforms such as AWS.
• Contribute to CI/CD pipelines, DevOps practices, and infrastructure automation.
• Work with SQL databases, Redis, Linux environments, and secure authentication solutions.
• Collaborate with stakeholders and development teams in a multi-vendor environment.

Skills

Kotlin

Java

Spring Boot

React

TypeScript/JavaScript

Microservices

API integrations

Kubernetes

AWS

CI/CD

Security practices

Multi-vendor experience

SQL databases

Redis

Finnish

English

Tools

Terraform

CloudFormation

Ansible

Job description

Kotlin Java Developer

Unikie is looking for experienced Kotlin Java Full Stack Application Developers to join a long-term customer project. In this role, you will develop and maintain business-critical web applications in a modern cloud-native environment. You will work across the full stack, building Kotlin/Java backend services, developing React frontends, and contributing to cloud infrastructure, CI/CD, and software architecture.

What You’ll Do

• Develop backend services using Kotlin, Java, and Spring Boot
• Build and maintain React applications with TypeScript/JavaScript
• Design and integrate REST and SOAP APIs
• Develop scalable microservices running on Kubernetes and cloud platforms such as AWS
• Contribute to CI/CD pipelines, DevOps practices, and infrastructure automation
• Work with SQL databases, Redis, Linux environments, and secure authentication solutions
• Collaborate with stakeholders and development teams in a multi-vendor environment

Required Qualifications

• 5+ years of experience in Full Stack or Backend development
• Strong hands‑on experience with Kotlin, Java, and Spring Boot
• Experience with React and TypeScript/JavaScript
• Solid understanding of microservices and API integrations
• Experience with Kubernetes, cloud platforms (AWS), and CI/CD tools
• Familiarity with Infrastructure as Code tools such as Terraform, CloudFormation, or Ansible
• Good knowledge of SQL databases and Redis
• Experience with secure development practices and testing
• Experience working in multi‑vendor environments
• Fluent Finnish and English